This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

ابحث في الدعم

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Incorrect fonts displayed on the website of ClustalW

  • 12 ردًا
  • 1 has this problem
  • 11 views
  • آخر ردّ كتبه Oxylatium

more options

ClustalW is a web-based program to align protein sequences. In order to read these alignments properly, they must be displayed in fixed-width font. However, firefox on mac displays them in sans-serif font.

This behavior is reproducible even when I create a new profile and use that. I have tried the same on firefox 8 on a Ubuntu Linux machine and there it works as expected.

ClustalW is a web-based program to align protein sequences. In order to read these alignments properly, they must be displayed in fixed-width font. However, firefox on mac displays them in sans-serif font. This behavior is reproducible even when I create a new profile and use that. I have tried the same on firefox 8 on a Ubuntu Linux machine and there it works as expected.

الحل المُختار

I figured it out! Thank you for all your replies.


When completely deleting Firefox app did not fix the problem, I suspected that it may be an issue with the fonts. So, I went to the FontBook app and noticed that there was an issue with the Courier font (which is the default monospace font). Once I fixed that, everything is working fine.

Read this answer in context 👍 0

All Replies (12)

more options

Did you try with another browser on Mac, like Safari or Opera?

Modified by Oxylatium

more options

Yes. I tried Safari on Mac. It works as expected. See attached images from Safari and Firefox.

more options

Maybe it's related to HWA and font rendering in Firefox. Options > Advanced > General > disable hardware acceleration and restart FF. Then test.

more options

Tried disabling HWA. Does not help.

more options

Argh. Do you know if it's possible to test a public demo of this application? Maybe there is a regression in FF9 (and even FF9+), who knows...

more options

It is a website that anyone can access. All you need is input protein sequences which can be downloaded for free from a database like uniprot.

Anyhow, I just realized that the additional information I have posted along with the question is buried under the 'More System details...' link. Please follow these steps to see what I am talking about:

1. Go to http://www.ebi.ac.uk/Tools/msa/clustalw2/

2. Enter the following as-is in the 'STEP 1' box: ('>Seq1' should be in first line and the sequence should be in the second line. Leave an empty line and do the same for seq2)

>Seq1

ACDEFGHIKLMNPQRSTVWY


>Seq2

ACEEFGGIKLMNPQRRTVWY

3. Hit 'Submit' A sequence alignment will appear. In firefox, the protein sequence is displayed in sans-serif font instead of monospace.

Modified by kayvee

more options

Sorry, I missed too the details about your STR. I tried with FF9.0.1 on Win 7, the alignment is fine (see my pic). Did you test with a new Firefox profile? I could be help.

more options

Indeed your alignment looks exactly how it is supposed to look. When I try it from Firefox installation on Ubuntu Linux machine, I get the expected monospace alignment. It appears to be a mac-specific thing.

I have tried using a new profile. I see the alignment in serif fonts but that is probably because I changed the default to sans-serif in my profile. I also deleted the entire firefox directory from the User's Library folder in Mac and fired up the browser hoping that I will start with a clean slate. Inspite of that I still see the alignment in serif and not monospace.

I have observed the same behavior in Firefox 8 also.

more options

I asked Mac user (OSX 10.7.2) to test with FF9, he got the same result as me, see http://imgur.com/ktpOS

So I think you changed the settings about fonts and now, rendering is badly affected. Anyway using a new fresh FF profile should fix the issue if the font settings are limited to the profile (I don't know Mac OSes), but that's clearly an issue on your side.

more options

I have completely deleted the Firefox app from my computer using AppCleaner and installed it fresh. In spite of that I have the exact same problem. What else can I do?!

more options

الحل المُختار

I figured it out! Thank you for all your replies.


When completely deleting Firefox app did not fix the problem, I suspected that it may be an issue with the fonts. So, I went to the FontBook app and noticed that there was an issue with the Courier font (which is the default monospace font). Once I fixed that, everything is working fine.

Modified by kayvee

more options

Great. I hope you have kept a backup of your profile anyway... ;)